Dave Plater composed on 2021-12-24 07:22 (UTC+0200):
...I'd forgotten that grub2 and xfs don't like each other and the system was unbootable. Ok backup root again and create an ext3 boot partition before the root partition and perform the mount --bind on sys proc and dev then chroot into root partition then use yast2 bootloader on it. Fine except "chroot /mnt" no longer appears to work, it says: "chroot: failed to run command ‘/bin/bash’: Permission denied"
mount <rootfilesystem> /mnt
mount -o bind /dev /mnt/dev
mount -o bind /sys /mnt/sys
mount -o bind /proc /mnt/proc
chroot /mnt
mount -a